Heavy metal removal from aqueous solution by wasted biomass from a combined AS-biofilm process

被引：41

作者：

Chang, W. C. ^{[1
]}

Hsu, G. S.

Chiang, S. M.

Su, M. C.

机构：

[1] Natl Yunlin Univ Sci & Technol, Dept Environm & Safety Engn, Yunlin 640, Taiwan

[2] Sci Pk Adm, Hsinchu 300, Taiwan

[3] Natl Dong Hwa Univ, Grad Inst Envitronm Policy, Hualien 974, Taiwan

来源：

BIORESOURCE TECHNOLOGY | 2006年 / 97卷 / 13期

关键词：

wasted sludge; extracelluler polymer; metal removal; biosorption; wasteweater treatment;

D O I：

10.1016/j.biortech.2005.06.011

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

This study evaluated the capability of metal biosorption by wasted biomass from a combined anaerobic-anoxic-oxic (A20)-biofilm process with simultaneous nitrogen and phosphorus removal. Zinc, cadmium and nickel were rapidly adsorbed in 20 min by the harvested sludge from a continuous-flow pilot-plant. Biosorption equilibrium was then reached in 6 h. The biosorption isotherm showed that metal biosorption behavior had fitted well to the Freundlich isotherm, but not Langmuir isotherm. The capacity constants k of Freundlich model for nickel, zinc and cadmium were 0.471, 0.298 and 0.726, respectively; the affinity constants 1/n were 0.444, 0.722 and 0.718, respectively. The order of metal affinity for the wasted biomass was Zn > Cd > Ni, which was in conformity to the other biosorption results with different biological sludge. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：1503 / 1508

页数：6

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